'That interview was no piece of cake': Andy Cohen reveals Teresa and Joe Giudice were his WORST guests on chat show Watch What Happens Live

He’s interviewed everyone from boldface Hollywood names to unfamiliar reality stars on his Watch What Happens Live show for Bravo.

But for Andy Cohen, the most difficult guests he’s had to quiz in the Clubhouse’s past five years were fixtures on the network's Housewives series.

‘That Teresa and Joe [Giudice] interview was no piece of cake,’ the host revealed on Sunday at a fan Q&A in Miami for his new book The Andy Cohen Diaries, reported People.

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Hard time: Watch What Happens Live! host Andy Cohen admitted that his interview with Real Housewives Of New Jersey stars Teresa and Joe Giudice was the most difficult he's had in the show's five-year run

From clubhouse to courthouse: Housewife Teresa, 42, will serve 15 months in federal prison on conspiracy and bankruptcy fraud charges; husband Joe will look after their four children until she leaves jail and then begin his 41-month term

'They're not the most reflective people I've met,' he said. 'I'm not throwing shade, but they're not reflective and introspective.'

Around 3.2m people tuned in to watch the Housewives franchise's most trouble-plagued stars give their first interview since being sentenced in federal court in October on conspiracy and bankruptcy fraud charges.

The sit-down was a shock to viewers and Cohen, who watched the drama play out in public, with Teresa, 42, shedding tears in a courthouse, saying it was ‘time for me to wake up... I fully take responsibility for my actions.’

But in the Bravo clubhouse, she fingered her accountants, attorneys and the show itself as part of the cause for her fall.

Reality: Teresa accepted responsibilities for her part in fraud activities, but blamed the series, partly, for her fall during an interview with Cohen

It's no wonder Cohen found it a challenge to get the couple to be more forthcoming and candid about their reality ahead.

Following her stint in jail—a 15-month prison sentence she starts on January 4—he said he would welcome the mother of four's return to the show she began six years ago, responding: 'I hope so!'

Her husband Joe, who will serve 41 months in prison following his wife's term, will take care of their daughters Gia, 13, Gabriella, 10, Milania, aged eight, and Audriana, aged five.

Back to business: Skinny Girl honcho Bethenny Frankel will return to the Real Housewives of New York series she left in 2010

The 46-year-old talk show host revealed that the current Real Housewives of New York cast is anticipating the return of former original cast member Bethenny Frankel, who left the series in 2010.

'I think that they think it's good for the show, and they all have their own opinions about her personally, so we'll see how they play out on the show,' he said, adding, 'They've expressed to me their excitement, nerves I think they would be expressing to each other.'

It's hoped that the Skinny Girl entrepreneur will help rescue the show's decline in ratings. And as far as bringing back other veteran cast members, he confirmed that there has been interested in Jill Zarin's return as well, 'Yes! There is!' he answered.